Kim Oakley with her son Jamey in a screen capture from one of Kim's YouTube videos.

Michael Dale Garritson, 61, and Matthew Alexander McDuffie, 27, are accused of beating 23-year-old Jamey Oakley hundreds of times over a three-week period.

Sheriff’s detectives reviewed more than 2,000 video recordings before issuing the arrest warrants.

McDuffie was taken into custody Wednesday night at his San Diego home, and Garritson turned himself in to Escondido police later that evening.

Sheriff’s Sgt. Mark Varnau described the abuse as one of the worst cases he has ever seen. The caregivers used “all manners of force,” he said.

Kim Oakley's video of her autistic son Jamey Oakley

The victim’s mother said Thursday that she became suspicious of the men about two months ago after finding the cord to a baby monitor had been cut. The monitor had been set up to show everything going on in her son’s bedroom. She said that made her think someone did not want to be watched.

Oakley had also started to notice that her son, who cannot talk, seemed to be unhappy on the days after the men had worked their shifts. One day, Jamey hugged her extra tight and made eye contact with her.

“He was trying to communicate with me,” she said.

She questioned both caregivers.

“They blamed everything on his severe autism,” Oakley said.

Besides being autistic, Jamey also has epilepsy and self-injurious behavior. He wears a helmet for protection against himself and uses a wheelchair.

He has the mentality of an 8-month-old and the motor skills of a 3- to 5-year-old, court documents say.

The caregivers also blamed other nurses, Oakley said, claiming they were not handling her son properly.

After finding the damaged baby monitor, she bought a video camera and installed it to record what happened in Jamey’s room. When she reviewed the video, she said she almost fainted.

“I couldn’t believe it,” Oakley said. “It was such a shock, such a betrayal.”

She notified the Sheriff’s Department that day.

The District Attorney’s Office charged Garritson and McDuffie with numerous counts of willful cruelty to a dependent adult, according to a complaint filed Wednesday in Vista Superior Court. The offenses are believed to have occurred between July 28 and Aug. 22. Authorities were notified Aug. 29.

Each is being held on $1 million bail.

Investigators said McDuffie engaged in 66 incidents of abuse, and Garritson 64 incidents.

The allegations against Garritson include driving his thumb into the victim’s eye, punching him in the head and grinding his shoe into the victim’s foot.

Portions of the videos were shown on KFMB, Channel 8, and show Jamey being hit and manhandled.

In all, seven caretakers looked after Jamey during the week. Garritson was hired in 2010, McDuffie in June 2011.